{"product_id":"bhir-1123488","title":"POLIN CYLINDER FOR RACE","description":"\u003cp\u003eProducts reserved exclusively for competitions in designated areas, in accordance with the provisions of the competent sports authorities. We assume no responsibility for improper use.\u003c\/p\u003e\u003cp\u003ePOLINI EVOLUTION 3 CYLINDER KIT FOR YAMAHA-MINARELLI ENGINES:\u003c\/p\u003e\u003cp\u003eGREAT PERFORMANCE TO BE THE NUMBER ONE\u003c\/p\u003e\u003cp\u003eNew Polini L\/C “Evolution 3” aluminum kit for Yamaha and Minarelli engines . The 47,6\u003c\/p\u003e\u003cp\u003ecylinder is homologated to race in all the scooter championships of the world and it\u003c\/p\u003e\u003cp\u003ehas the exhaust port with a bridge again. The design of the new bridge port allows the\u003c\/p\u003e\u003cp\u003eexhaust port to be much bigger which is very important to achieve maximum\u003c\/p\u003e\u003cp\u003eacceleration and more power at every rpm.\u003c\/p\u003e\u003cp\u003eThe Cylinder head is made of two pieces, it is made with a central dome that works as\u003c\/p\u003e\u003cp\u003ethe combustion chamber and a cover studied to better dissipate heat.\u003c\/p\u003e\u003cp\u003eIt is possible to fit the kit without modifying the original cases.\u003c\/p\u003e\u003cp\u003eIn order to achieve the best performance it is suggested to replace the crankshaft,\u003c\/p\u003e\u003cp\u003eeven if it is not compulsory.\u003c\/p\u003e\u003cp\u003eTECHNICAL FEATURES:\u003c\/p\u003e\u003cp\u003ePower unit designed for high performance.\u003c\/p\u003e\u003cp\u003eIncreased displacement with bore of 47,6 mm.\u003c\/p\u003e\u003cp\u003eCylinder, light alloy die-cast\u003c\/p\u003e\u003cp\u003e“Closed Deck” system for the internal flow of the coolant.\u003c\/p\u003e\u003cp\u003eCylinder liner with nickel-siliceous coating\u003c\/p\u003e\u003cp\u003eFive exhaust transfers of brand new drawing.\u003c\/p\u003e\u003cp\u003eExhaust port of bigger dimensions with central bridge.\u003c\/p\u003e\u003cp\u003eBetter exhaust gas scavenging\u003c\/p\u003e\u003cp\u003eIncrease of the performance at high number of revolutions.\u003c\/p\u003e\u003cp\u003ePiston, gravity cast in light alloy with high silicon content\u003c\/p\u003e\u003cp\u003eCast iron chromed piston rings \"S10\"\u003c\/p\u003e\u003cp\u003eHead in light alloy.\u003c\/p\u003e\u003cp\u003eCombustion chamber with specific squish to eliminate detonations.\u003c\/p\u003e\u003cp\u003eCode : 166.0113 – Sp. Ø 12\u003c\/p\u003e\u003cp\u003eCode : 166.0113\/10 – Sp. Ø 10\u003c\/p\u003e","brand":"POLINI","offers":[{"title":"Default Title","offer_id":58185528050012,"sku":"1123488","price":648.75,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/5072\/8284\/files\/800Wx800H-1123488-1.jpg?v=1783066113","url":"https:\/\/checkout.xparts.weostores.com\/products\/bhir-1123488","provider":"xparts","version":"1.0","type":"link"}